Hedman Hedders has been manufacturing quality headers in the USA since 1954, and they've been manufacturing Headers for Chevy Corvettes for decades. Each set uses mild steel, smooth flowing, CNC mandrel bent tubes, that are hand-welded to ensure each pair is identical to the next. Hedman's unique, gasketless ball and socket collector design allows your Small Block Chevy exhaust system to bolt up, even if it is not perfectly aligned with the header collectors.
These LONG-TUBE headers fit 1984-1991 Chevy Corvettes powered by a SB Chevy (Gen 1) engine. The smooth 1-5/8 in tube design provides ample exhaust flow to let your Vette's 283-400 SB Chevy engine breathe easy, and produce maximum horsepower and torque. These headers are uncoated, and ship from the factory with a temporary black paint that will burn off when submitted to normal operating temperatures. For protection against the element and lower underhood temperatures, these headers are also available with a silver or black ceramic-metallic finish.
Each set includes a pair of gaskets, header flange bolts and collector bolts. No collector gasket is needed. Hedman Hedders is so confident in the quality of its headers that these headers are factory backed by a Limited Lifetime Warranty.
Hedman Hedders Standard Uncoated Headers; 1-5/8 in. Tube Dia.; 3 in. Coll.; FULL LENGTH Design 68440
Specifications:
| Tube Style | Long Tubes |
| Tube Size | 1-5/8 in. |
| Finish Type | UNCOATED Mild Steel! Shipped with Temporary Paint. |
| Tube Length | Long Tubes |
| Tube Design | Standard |
| Replacement Head Flange Gasket | 27500 |
| Finish | Uncoated |
| Collector Diameter | 3 in. |
| Replacement Gasket | 27500 |
| Installation Hardware Included | Yes |
| Header Fasteners Included | Yes |
| with A.I.R. System | No |
| with EGR | No |
| Y-Pipe Included | No |
| E.O. # | No |
| Primary Tube Gauge | 16g |
| Notes | 84-91 Chevrolet Corvette 283-400 |
| Tube Material Thickness | 16g |
| Package Contents | Headers, ball and socket reducers (exhaust adapters), gaskets, mounting hardware |
| Contents | Header(s), new bolts, gasket(s) to head, reducer(s) and hardware, instructions |
| Quantity | Sold as a pair. |
| Title | HEDMAN HEDDERS STANDARD UNCOATED HEADERS; 1-5/8 IN. TUBE DIA.; 3 IN. COLL.; FULL LENGTH DESIGN |
| Cylinder Head | Stock Profile Heads |
| Bolts/Studs Included | Yes |
| Motor Mounts Included | No |
| Manual Transmission - Floor | Yes |
| Header Style | Long Tube |
| Reducers Included | Yes |
| Air Conditioning | Yes |
| Automatic Transmission - Column | No |
| Automatic Transmission - Floor | Yes |
| Collector Size | 3 in. |
| Flange Style | Standard |
| Header Port Shape | Round |
| Key Feature | Non-EGR |
| Manual Transmission - Column | No |
| Port Shape | Round |
| Crossover Pipe Included | No |
| Power Steering | Yes |
| Variations | 68446, 68448 |
| Cylinder Head Port Shape | Round |
| Header Finish | Uncoated |
| Header Material | Mild Steel |
| Mounting Hardware Included | Yes |
| Primary Tube Diameter (in) | 1.625 in. |
| Weld-Up | No |
| Collector Bolts Included | Yes |
| Catalytic Converter(s) Included | No |
| Tuned | No |
| Emissions Notes | Not Legal For Street Use on '75-Later Model Years! Legal for off-road use only. |
| Header Construction | MILD STEEL- Standard-Duty |
| Gasket Or Seal Included | Yes |
| Reducer Outlet Size | 2-1/2 in. |
| Collector Attachment | 3 in. |
| Flange Thickness | 0.3125 in. |
| Exhaust System Dia | 2-1/2 in. |
| Material | Mild Steel |
| Collector Style | BALL and SOCKET Style (Gasketless) |
| California Proposition 65 | WARNING: Cancer. For more info visit www.P65Warnings.ca.gov |
| Tube Diameter | 1-5/8 in. |
| Description_SHO | HEADERS, UNCOATED |
| Description_INV | HEDMAN GM CAR HEADERS-UNCOATED |
| Description_DEF | Exhaust Header |
| Description_DES | Long-Tube Headers For 1984-91 Corvette with 283-400 |
| Description_ASM | 1988 Chevrolet Corvette 35th Anniversary Edition CID 350 Naturally Aspirated GAS, 1984-1987 Chevrolet Corvette Base CID 350 Naturally Aspirated GAS, 1989-1990 Chevrolet Corvette Base CID 350 Naturally Aspirated GAS |
| Description_EXT | Standard Uncoated Headers; 1-5/8 in. Tube Dia.; 3 in. Coll.; FULL LENGTH Design |
| Description_MKT |
Hedman Hedders has been manufacturing quality headers in the USA since 1954, and they've been manufacturing Headers for Chevy Corvettes for decades. Each set uses mild steel, smooth flowing, CNC mandrel bent tubes, that are hand-welded to ensure each pair is identical to the next. Hedman's unique, gasketless ball and socket collector design allows your Small Block Chevy exhaust system to bolt up, even if it is not perfectly aligned with the header collectors. These LONG-TUBE headers fit 1984-1991 Chevy Corvettes powered by a SB Chevy (Gen 1) engine. The smooth 1-5/8 in tube design provides ample exhaust flow to let your Vette's 283-400 SB Chevy engine breathe easy, and produce maximum horsepower and torque. These headers are uncoated, and ship from the factory with a temporary black paint that will burn off when submitted to normal operating temperatures. For protection against the element and lower underhood temperatures, these headers are also available with a silver or black ceramic-metallic finish. Each set includes a pair of gaskets, header flange bolts and collector bolts. No collector gasket is needed. Hedman Hedders is so confident in the quality of its headers that these headers are factory backed by a Limited Lifetime Warranty. |
| Description_FAB | Handcrafted, Mild Steel Construction. |
| Description_FAB | Long Tube Header Design Provides Excellent Top-End Horsepower and Torque. |
| Description_FAB | Ball & Socket Collector Design requires No Gasket, and Allows For More Exhaust System Misalignment than Old School, Gasket-Style Header Collectors |
| Description_FAB | Includes All The Necessary Mounting Hardware, Gaskets and Reducers (exhaust adapters) |
| Description_FAB | Limted Lifetime Warranty On Construction, Five Year Warranty on Factory-Applied Header Coating! |
| Description_FAB | Proud To Say, Made In The USA, Since 1954! |
This Part Fits:
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 1988 | Chevrolet | Corvette | 35th Anniversary Edition | Air Conditioning: Yes; Power Steering: Yes; Auto Transmission - Column: No; Auto Transmission - Floor: Yes; Manual Transmission - Column: No; Manual Transmission - Floor: Yes; Footnotes: (1) Without smog injection or injection heads.; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Footnotes: (121) Must modify rotary A/C bracket.; Footnotes: (203) Non-E.G.R. equipped; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Emissions Notes: RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.; Engine Family: SB Chevy 283-400 (Gen 1) |
